A new hypothesis for cavitation nucleation in gas saturated solutions:Clustering of gas molecules lowers significantly the surface tension

作     者：Zhaoyang Yu Jing Li Xianren Zhang Zhaoyang Yu;Jing Li;Xianren Zhang

作者机构：State Key Laboratory of Organic
Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China College of Biomedical Engineering&the Key Laboratory for Medical Functional NanomaterialsJining Medical UniversityJining 272067China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第50卷第10期

页      面：347-351页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(21978007) 

主　　题：Cavitation Dissolved gas Thermodynamics Molecular simulation Surface tension 

摘      要：Cavitation in water generally takes place at much lower negative pressure than predicted from *** this work,we try to stress the discrepancy from the influence of the dissolved gas on cavitation *** combining molecular dynamics simulation and thermodynamic analysis,we evaluated the lowering of surface tension as a function of density of gas molecules in gas clusters formed in aqueous *** found that the obtained surface tension of small gas clusters is much more substantially reduced than *** surface tension lowering and the non-ideality of gas molecules in the clusters are then taken into account in determining the nucleation of cavitation,and as a consequence,the required negative pressure for cavitation becomes comparable to experimental ***,we give an alternative explanation for the discrepancy of cavitation pressure between experiment and theory,i.e.,it is the substantially reduced surface tension for small gas nuclei,which have not been taken into account in theory,along with the ideal gas approxiamtion that induce its deviation from the experimental values.